GEOB 103 Chapter Notes - Chapter 6: Large Woody Debris, Flow Velocity, Suspended Load

• School: UBC
• Department: Geographical Biogeosciences
• Course: GEOB 103
• Professor: Brett Eaton

Document Summary

Boundary conditions: rock, sediment type, vegetation (ph 6. 3, 6. 4) Usually we are interested in floods (like the bankfull q) ph 6. 8. Bedrock & clay vs. sand & gravel. Ge examples: alluvial channels (ph 6. 4, bedrock channels (ph 6. 5) o. Large woody debris (ph 6. 6b) fig 6. 11. Flow velocity, (r is basically the average water depth!) As r goes up, u goes up. As s goes up, u goes up. Manning"s n, as n goes up, u goes down (ph 6. 7, table 6. 1) Discharge variability (fig 6. 2) (a, c, k depend on cross section details, highly variable from place to place) Cutbank retreat & point bar growth (ph 6. 11) (ph 6. 12 time for advance) Fig 6. 5 suspension, bedload dissolved load, armor layer (videos of movement in flames) Transport rate vs. shear stress (fig 6. 7) Changes in transport type (fig 6. 5) during a flood: dissolved load (ground water chemistry, low flow: bedload, find particles, high flow: bedload (large), suspended load (fine)